Meta-analysis comparing differing methods of endoscopic therapy for colorectal lesions

Table 1 Study characteristics comparing outcomes of colorectal endoscopic mucosal resection vs endoscopic submucosal dissection

Ref.	Year	Study site	Publication type	Total sample size	EMR			ESD
					Sample size	Male (%)	Age [mean ± SD (range)]	Sample size	Male (%)	Age [mean/median ± SD (range)]
Tajika et al[22]	2011	Japan	Full paper	189	104	61	59.9 ± 10.6	85	58	64.3 ± 9.2
Lee et al[23]	2012	South Korea	Full paper	454	140	64	63 (23-90)	314	55	61 (25-85)
Kobayashi et al[24]	2012	Japan	Full paper	84	56	68	65.9 ± 9.9	28	68	65.1 ± 9.7
Saito et al[25]	2010	Japan	Full paper	373	228	-	64 ± 4	145	-	64 ± 11
Kim et al[26]	2009	South Korea	Abstract	121	76	-	-	45	-	-
Tamegai et al[19]	2007	Japan	Full paper	103	32	-	-	71	54	63.4

EMR: Endoscopic mucosal resection; ESD: Endoscopic submucosal dissection.